Support for adhesive tape

Abstract

 The invention concerns a support for one faced or double faced adhesive tape with automatic cutting of same through a blade mounted adequately inside the support.
The advantages of the invention are - among others - that it allows to avoid the useless wear of the tape due to the use of nails in order to detach the tape stuck at its end from the portion that will have to be used.

Description

[0001] The present invention'covers a support for adhesive tape (single or double face type) with an automatic cutting of same through a blade appropriately mounted inside the supnort.

[0002] Some supports to be used with an adhesive tape for writing desk are at present already known. In this kind of supports the user has to detach the tape from the roll and then cut it through pressure .on a fixed cutting device on the support.

[0003] This implies difficulties for use and placement of the tape on the surfaces to be united or glued.

[0004] Another drawback is represented by the fact that in this kind of support and after the last use of it, the free end of the tape on the roll or reel is to be stuck so that the user meets difficulties in the subsequent use of the tape, because he has to detach the end that was previously stuck and needs in most cases to resort to an ancillary element which is generally not at hand, in which case he has to use his nail, thus damagining the tape to be unrolled. All this entails a waste of a portion of the adhesive tape.

[0005] By usin the inv ntion's support, one averts the above . mentioned drawbacks, because the support in Question is formed by a body or casing having an approximately prismatic shape, easily handled, which allows without any intervention of the user a perfect distribution, sticking and cutting of the tape. The roll carrier has a central notch through which it is coupled with a shaft, along which it can displace itself, which shaft protrudes inside and perpendicularly to one of the faces of the support. Inside the notch,a spring is anpropriately housed in the space between the shaft and one of the ends of the notch. Thespring adjusts the displacement of the roll-bearer pushing it in a direction contrary to a point where a roller acting as guide of the tape is present, while the rollbearer is positioned at any moment by a retaining and sliding contrivance, through which an ideal distance between the roll bearer and the roller-guide is kept in operation, according to the load conditions of the tape.

[0006] This contrivance consists of a serrated groove.on the upper face of the roll bearer, which mates with another groove in opposed direction provided on the portion of the tape facing the roll-bearer, so that when the roll-bearer is moving towards the roller-guide whilst the tape is consumed, the teeth on one and other sidemake it easier to effect a relative displacement in this direction, but are jammed between them should the spring action try to displace the roll bearer in opposed direction.

[0007] The guiding roll is placeed onto a shaft of the bottom wall* of the casing near a side opening of the same, this aperture defining through a corresponding surface portion of the roller an exit cut for the tape, the end of which is stuck to the corresponding sticking surface by pressure on the guiding roller, so that the revolution of same entails the sticking of the tape and its fixing through a second roll parallel to the former and placed near it.

[0008] According to a variant of the invention the guiding roller is placed inside, and on the outside portion one arrages a floating roller, which withdraws inwards and connects the tape with the cutting bladethus avoiding the unnecessary protruding of the contrivance whilst cutting the tape.

[0009] The support is shaped outside in a way to be easily adaptable to the form of the hand and has on its front face, and in the lower end area,a button which can actuate a blade arranged in a convenient way inside the casing.

[0010] This pushbutton consists of a structure which is oscillating on the shaft of the second roller and comprizes the cutting blade. This structure is constantly pushed into its withdrawn position by a spring assembled between it and the casing or a rib of same, so that when pushbutton is actuated and support is merely inclined, the cutting blade moves downward between parallel guides and gets out in tangent direction to the guide in order to carry out the cutting of the tape.

[0011] . In order to be able to better understand the invention, we refer hereinafter to a practical instance of support embodiment, this being a merely enunciative and non limitative example of the invention, with reference to the enclosed drawings on which we have:

Fig.1 with an elevation view of the support

Fig.2 with a bottom view of the figure 1

Fig.3 with an elevation view of the inside of the support without lid

Fig.4 with a view of the lid

Fig.5 with a view similar to that of fig.3 of a variant of the support

Fig.6 with another view of the support of the fig.5, but in operation position.

[0012] The support 1 is formed by a prismatic casing having an irregular base,so as to fit adequately a man'shand and comnrizes a body 2 and a lid 3.

[0013] On the bottom wall 4 of the body 2 appears a shaft 5, coupled with the groove 6 of the rollbearer 7 of the tape 8, the roll-bearer of which shows on its face 9 some cuts 10 having the shape of saw teeth, or simply of teeth mating the cuts or teeth 11 in the central portion 12 of the lid.

[0014] Tape 8 slides on the outer portion of the roller-guide 13, passing under the blade 14 showing a sharp cutting area, whilst roller 15 effects pressure on the stuck tape fixing 'same on the sticking surface.

[0015] ■ Roller 15 is assembled onto a shaft 16 parallel to the shaft 17 of the guiding roller.

[0016] Near the roller 15 one places laterally a pushbutton 18, pivoted on shaft 16 of the roller 15,and which is entrusted with the displacement of the blade 14 in order to produce the cutting of the tape 8. Said pushbutton is constantly pushed into its retracted position by spring 19,assembled between it and rib 20 of the casing.

[0017] Blade 14 slides duly guided between the cylinder 13 and the cross protrusion 21 so that it acts tangentially to the guiding roller.

[0018] Onœtape has been stuck, a small revolution of the support is sufficient for the actuation of the pushbutton and the automatic cutting of the tape.

[0019] On the lower face of the support appear some recesses, which help in detaching the adhesive tape once it has been decided to use the support.

[0020] According to the variant appearing on figures 5 and 6, the guiding roller 13 has moved inwards and a floating roller 22 has been assembled on a toothed shaft 23,placed between two recesses 24 having an angular form,and showing sidewise on its inner face some teeth 25. The roller 22 is constantly pushed into its outer position by spring 19 which is, in this case, assembled by one end on a peripheral groove 26 of said roller and by the other end on the support of the blade 27 mounted 'in a rotating way,just as support 19 on shaft 28. Pushbutton 18 .is assembled on shaft 16'. Blade 14 is arrow shaped and cuts from the centre towards the rims of,the tape and is assembled on'the guides 29 in this case.

[0021] With this solution (see figure 6) one obtains that the cutting is effected without any outsliding of the blade from the support. This is obtained through the swinging roller 22, which is starting and making the shaft 23 meshing with teeth 25 of the housing 24, in opposition to the strength of the spring 19. This causes its falling down towards the inner groove of the recesses 24 (position appearing on figure 6). When sticking operations are over, a simple revolution of the support suffices for the protruding part of the pushbutton 18 entering into contact with the surface and revolving on shaft 16', so that blade support 27 is pushed against spring 19, with consequent sliding out of the blade which will now effect the cutting of the tape 8.

Claims

1.- Sunrort for adhesive tape nt least on one of its faces, of the kind formed by a body and a preferably prismatic housing, inside which a roll-bearer is housed, characterized by the fact that the roll bearer has a central diametrical cut through which it is coupled in a sliding way with a shaft protruding from the bottom of the housing, there being inside said cut or notch a spring that adjusts the displacement of the roll-bearer in a direction contrary to the point where there is a guiding roller for the tape, whilst said roll bearer is positioned at any moment by a retaining and sliding device, so that there is, when a/m sunport is in operation,always an ideal and adequate distance kept between the shafts of the roll bearer and of the guiding roller, according to the loading of the tape, and whilst the guiding roller is placed on a shaft of the bottom wall of the housing near a lateral aperture of same, defining through the corresponding surface portion of the roller an exit opening for the tape, the end of which is stuck to the corresponding surface through pressure.from the guiding roller, so that by rotating same the tape is stuck and fixed by a roll which is placed close by and parallel to the former , there also being a structure mounted on housing and equipped with a cutting blade, having the shape of an arrow bit, and positioned at any moment by a spring which is integral with said structure and support, so that,when support is rotated,a pushbutton is pressed which fixes the structure, which pivots on its axis and the blade cuts the tape from centre to rim.

2.- Support according to claim 1, characterized by The fact that the retaining and sliding contrivance m.a. is formed by serrated teeth & resting on the free base of the roll bearer, which is meshing with at least one tooth protruding from the lid of the support, so that when tane is rolling further and its diameter decreases through use, the traction of the tape stuck to the surface creates a stress which is superior to that of the spring and produces a displacement of the roll-bearer against the spring strength and towards the guiding roller, the displace ment of which is adjusted by the contrivance, the activity of same disappearing when support lid is opened in order to reload the tape , at which moment the spring moves the roll bearer in an opposed direction.

3.- Support for a tape adhesive on at least one of its faces, formed by a body or casing inside which a roll-bearer is housed,characterized by the fact that the roll-bearer has a central notch cut in diametrical direction, through which it is coupled in sliding way with a shaft protruding from the casing, it being constantly pushed by a spring between the shaft and the end of the above notch, there being on the upper portion a set of teeth meshing with at least one tooth on the lid of the casing, the tape passing outside after turning partially around a roller placed in swinging position, which, due to its grooved shaft meshing with the teeth on one of the arms of the angular grooves housing its ends, slightly rotates and at first moves to the bottom of the other side of the groove" separating itself from the outside, placing the tape closer to the roller which is effecting pressure on the tape for a perfect adhesion, and then to the cutting blade , thus avoiding the sliding out of the blade during the cutting operation, the swinging roll being constantly pressed by a spring which keeps the pushbutton of the blade in its outer position through a pivoting element put in intermediate position, which acts upon the end of the blade which is guided by two grooves cut into the bottom and into the lid of the casing.

Drawing